Options: two internal refractions before emerging out of the drop, one internal refractions before emerging out of the drop, no internal refraction, either one or two internal refractions before emerging out of the drop

The significant shifts in Indian agriculture during green revolution include

Options: non-food grains reported some spectacular progress and shift in the cropping pattern, major food grains, in the eastern regions productions decreased and in the northern states increased, both (a) and (b), None of the above